Add case status filter

Still needs to be added to reports loaded from snapshots
add filter to beneficiary report
Merge remote-tracking branch 'origin/master' into opm_filter
Don't load snapshot when filtering by case status.
Switch to use the existing open/closed filter
Move case status filter to the bottom
Merge pull request #2147 from dimagi/opm_filter

Add a case status filter to OPM BPR